Mechanical movement



(No Model.) 3 Sheet-sSheet i.

O. J. ZIEGLER. MECHANICAL MOVEMENT.

' No. 587,380. Patented Aug. 3, 1897.-

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0. J. ZIEGLBR. MECHANICAL MOVEMENT.

No. 587,380. Patented Aug. 3,1897.

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(No Model.) 3 Sheets-Sheet 3.

0. J. ZIEGLER. MEGHANIGAL MOVEMENT.

- No. 587,380. Patented Aug. 3,1897.

UNITED STATES PATENT EErcE.

OSCAR J. ZIEGLER, OF FREEPORT, ILLINOIS.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 587,380, dated August3, 1897. Application filed September 27, 1895. Serial No. 563,860. (Nomodel.)

To all 1071,0721 it may concern.-

Be it known that I, OSCAR J. ZIEGLER, a citizen of the United States ofAmerica, residing at Freeport, in the county of Stephenson 'and State ofIllinois, have invented certain new and useful Improvements inMechanical Movements, of which the followingis a specification.

My invention relates to improvements in mechanical movements, andparticularly in devices for converting rotary into reciprocal motion-as,for instance, in applying the rotation of a shaft to the reciprocationof a pitman.

The invention is fully described and explained in this specification andshown in the accompanying drawings, in which Figure 1 is a sideelevation of adevice embodying my improvements,-the view being in thedirection indicated by the arrow (1 in Fig. 2. Fig. 2 is a centralvertical section of the device shown in Fig. 1, the plane of sectionbeing through the line 2 2, Fig. 1. Fig. 3 is a transverse verticalsection through the upper part of Fig. 2, the plane of section beingthrough the line 3 3 in said figure. Fig. 4 is a view partly in top planand partly in horizontal section, the plane of section being through theline 4 4, Fig. 2.

In the views, A is a frame adapted to support the parts of the mechanismembodying my invention, this frame being of any suitable form adaptingit for theparticular use in which the mechanism may be employed. I haveused the device in practice in a pumping-windmill, and the frame shownin the drawings is adapted for that use and is so constructed as torotate about its vertical axis. This, however, is not essential to mypresent invention, and the frame maybe varied in form as may be requiredor desired.

At a suitable point in the frame A is journaled a transverse shaft B,provided with a pulley B or with other means for rotating the shaft, andon the shaft, within the frame, are rigidly mounted two pinions G O insuitable relation to each other. The pinions O C engage, respectively,two correspondinglyplaced spur-gears D D, mounted on studs D D set inthe frame, and the gears D D carry pinions E E, connected by anintegrallyformed transverse crank-pin E, the pinions E E beingpreferably pivoted to the gearwheels D D by means of gudgeons E E formedon the pinions and journaled in suitable bearings in the gear-wheels.The two pinions E E are in engagement with a stationary internal gear orannular rack F of double their diameter fastened to the frame A in anysuitable manner, and a pitman P, hung upon the transverse crank-pin E,between thetwo pinions E E, passes through a suitable opening in theannular gear F and is operated by the movement of said crankpin, theshaft B being set at one side of the vertical axis of the device and outof the path of the pitman.

Theinternal gear F maybe constructed and attached to the frame in anysuitable manner, but is preferably made in four similar pieces, theentire gear being thus divided on a transverse plane and also on a planeparallel to its faces. Transverse bolts ff connect the parts, and thewhole ring is preferably held in place by means of transverse rods F F,passing through the ring and lying in notches in the frame, the rodsthemselves beingtied together by bolts f parallel to the plane of thegear.

In operation the rotation of the shaft B is communicated through thepinions (1 O to the gears D D, and the rotation of the gears D D carriesthe pinions E E in an annular path, thereby rolling them about the innerface of the annular gear or rack F. The rack being of double thediameter of the pinions E E the crank-pin E moves in a straight lineback and forth across the center of the rack, and the pitman is soplaced as to coincide with this line of movement of the crank-pin. Thepitman is therefore reciprocated in a straight line and has no lateralmovement whatever, and the entire device operates positively and withbut little friction. e

I am aware that a pitman movement made up of a rotating wheel or plate,a pinion mounted on the plate and provided with a crank-pin, and astationary annular rack in engagement with the pinion has long beenknown and used, and I do not claim that as my invention. I have found,however, in practice that a device made in accordance with the oldconstruction just described is objectionable for the reason that all thebean in gs are on one side and all the Working parts overhang, so thatthe strain on the bearings and pivots is unequal, and the wear isthereby greatly increased. Such a device is therefore unsuited for anyheavy work, and I have found that in windmill construction, forinstance, a device made as suggested is shortlived and entirelyunsatisfactory.

The object of this invention is to utilize the old gearing abovedescribed and render it practical by providing it with symmetricalbearings, so as to equalize the strain on the parts and bring the weightmidway between the working bearings instead of at one side of a singlebearing. It is evident that such duplication of the parts and bearingsis impossible except by the addition of some means of communicatingpower from the driving-shaft to the two symmetrical pinioncarryingwheels, and this has been accomplished by providing the driving-shaftwith pinions C C, engaging the pinion-carrying wheels.

It will be seen that in the construction which I have adopted the pitmanhangs in the center and all the parts are symmetrical with reference toit, so that its weight is distributed to all the bearings, and theconstruction and connection of all the elements of the de vice are suchas to hold them in their proper relation and give to thesymmetrieally-placed bearings substantially the effect and operation oflong shafts journaled in suitably-separated boxes.

The shaft B may be connected with the gears D D by means of chain belts,if desired, instead of by spur-gearing, but one of these connections isthe evident equivalent of the other.

Having now described and explained my invention, what I claim as new,and desire to secure by Letters Patent, is-

1. The combination with a suitable frame and a driving-shaft, 13,mounted therein and provided with pinions, O, O, of the gear wheels D,D, engaging said pinions, C, O, pinions E, E, mounted upon and betweensaid gear-wheels, and provided with an interposed crank-pin, E, astationary internal gear, F,

mounted in the frame and engaging the pinions, E, E, and a pitman, P,hung on the crank-pin, E, and operated by the movement thereof, theinternal gear being formed with a suitable opening for the passage ofthe pitman.

2. The combination with the frame, the shaft, B, and the rotatingwheels, D, D, receivingmovement from said shaft, of the pinions, E, E,mounted upon and between said wheels and connected by the integralcrankpin, E, the stationaryinternal gear, F, 111 ounted in the frame andengaging the pinions, E, E, and the p'itman, P, hung on the crank-pin,E, and operated by the movement thereof, the internal gear being formedwith an opening for the passage of the pitman.

3. The combination with the frame, the shaft, 13, the rotating wheels,D, D, operated by the shaft, the pinions, E, E, mounted on the wheels,D, D, and provided with an interposed crank-pin, E, and the pitman, P,.

hung on the crank-pin E, of the stationary internal gear, F, engagingthe pinions, E, E, and the rods, F, F, passing transversely through saidinternal gear and seated in the frame, whereby the internal gear is heldin suitable relation to the frame.

OSCAR J. ZIEGLER.

\Vitnesses:

W. A. MERRIFIELD, R. H. WILEs.

